OZG-626 sort vorganglist for EA and use docker for mongodb testing

pluto-server/pom.xml

...ver/src/main/java/de/itvsh/ozg/pluto/vorgang/Vorgang.java

...a/de/itvsh/ozg/pluto/vorgang/VorgangHeaderRepository.java

.../itvsh/ozg/pluto/vorgang/VorgangHeaderRepositoryImpl.java

...erver/src/test/java/de/itvsh/ozg/pluto/DbInitializer.java

...r/src/test/java/de/itvsh/ozg/pluto/TestConfiguration.java

.../test/java/de/itvsh/ozg/pluto/common/test/DataITCase.java

...tvsh/ozg/pluto/vorgang/VorgangHeaderRepositoryITCase.java

pluto-server/src/test/resources/application-with_db.yml